Title:
OPTICAL FIBER STRAIN MEASUREMENT DEVICE AND BRILLOUIN FREQUENCY SHIFT OFFSET ADJUSTMENT METHOD
Document Type and Number:
Japanese Patent JP2022040695
Kind Code:
A
Abstract:
To enable measurement of a correct BFS by automatically changing a BFS offset in a BOTDR device.SOLUTION: An optical fiber strain measurement device comprises: a light source section for generating probe light; a wavelength control section for receiving an input of back-scattered light to be generated by the probe light in an optical fiber to be a measurement object and outputting a back Brillouin scattered light included in the back-scattered light; a self-delay interferometer for generating a measurement signal to which the back Brillouin scattered light is input; and a signal processing section. The signal processing section comprises: means for generating measurement result data including optical fiber strain data from the measurement signal; and means for changing a BFS offset amount when a standard deviation of a BFS exceeds a threshold and also when signal loss of an area where the standard deviation exceeds the threshold is equal to or less than allowable loss.SELECTED DRAWING: Figure 2
Inventors:
TANIGUCHI SHIMPEI
Application Number:
JP2020145523A
Publication Date:
March 11, 2022
Filing Date:
August 31, 2020
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD
International Classes:
G01D5/353; G01B11/16
Attorney, Agent or Firm:
Hiroyuki Okada
Takashi Ogaki
Takashi Ogaki
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